BACKGROUND Arterial flow velocity changes on transcranial Doppler can reflect changes in cerebral flow during position-induced ischemia if obtained during short-term monitoring of positional changes. SUBJECTS AND METHODS Our multicenter group monitored symptomatic and asymptomatic arteries in patients with recurrent neurological deficits during positional changes and documented intracranial a...

The aim of this study was to examine variations in measures of body composition in elite soccer players. Skinfolds and measures of body mass (BM) recorded on a monthly basis across an entire competitive season in a group of senior professional players (N=26) were used to estimate body fat (%BF) and provide fat-free body mass values (FFBM). Mean values in players were compared between six specif...

The aim of this study was to examine variations in measures of body composition in elite soccer players. Skinfolds and measures of body mass (BM) recorded on a monthly basis across an entire competitive season in a group of senior professional players (n = 26) were used to estimate percentage body fat (%BF) and provide fat-free body mass (FFBM) values. Mean values in players were compared betwe...

In the normal development of retinotectal connections, the site in the tectum at which an optic fiber synapses is related to the position of its ganglion-cell body in the retina. How and when the ganglion cells acquire information about their positions is unknown, but the positional information that each ganglion cell will ultimately act upon is determined or specified at embryonic stages 28-32...

The genetic basis of morphological differences among species is still poorly understood. We investigated the genetic basis of sex-specific differences in wing size between two closely related species of Nasonia by positional cloning a major male-specific locus, wing-size1 (ws1). Male wing size increases by 45% through cell size and cell number changes when the ws1 allele from N. giraulti is bac...

The traditional design of the Generalized Predictive Control (GPC), to deal with setpoint changes and tracking reference (denoting offset free), is to use an integral control weighted or an incremental plant model. The purpose of this paper is to derive an alternative way of GPC synthesis, from a positional plant model to cover zero steady-state offset, involving the selection of an integral po...

The three-dimensional (3D) changes in hard tissue position following orthognathic surgery have been reported using 3D cephalometry, changes in volume, principal component analysis, and changes based on the surface model of the hard tissue. The aim of this study was to determine the validity of using surface models as a method of assessing positional changes of the maxilla and mandible. The actu...

To represent real m-dimensional vectors, a positional vector system given by non-singular matrix M ∈ ℤm×m and digit set Ɗ ⊂ ℤm is used. If m = 1, the coincides with well known numeration used to numbers. We study some properties of systems which are transformable from case 1 higher dimensions. focus on an algorithm for parallel addition allowing eventually periodic representation vectors ration...